In 2004, Odyssey released a dual material insert technology for a 14 model putter line, called the White Steel series. The head material was a high quality stainless steel with satin
finish. The insert itself was stainless steel in the ball contact area, surrounded by polymer, both around the metal plate, as well as behind it.

Many are still in play today, and for those that wear out their insert, there are plenty of models available on eBay for a great price, or you can replace/restore with some options below.

These sales are for one insert only. The putter heads in the photos are for visual only, not included.